The Nightingale PRO is a planar magnetic single driver IEM featuring a 14.5 mm driver and a wooden faceplate. It launched in late 2025 and the price is typically 295 USD.
The Timeless II also uses a 14.5 mm planar magnetic driver. It was launched in 2024 following the original and very popular 7Hz Timeless (2021). Typical price is 229 USD.
When it comes to build, both feature metal housings, with the Nightingale Pro adding a wooden faceplate. The Nightingale Pro feels slightly larger in the ear. Both ship with nice cables.
The Timeless II comes with a rather heavy circular metal storage box with a screw on top – perfect for having on the desk. The Nightingale Pro includes a lighter, real leather travel case with a zipper – better suited for travel/commute.
SIVGA NIGHTINGALE PRO SPECIFICATIONS
- Style: In-Ear Monitor
- Driver Type: Planar Magnetic
- Driver Size: 14.5mm
- Frequency Response: 20Hz–40kHz
- Impedance: 16 Ohms (±15%)
- Sensitivity: 107dB (±3dB)
- Cable Length: 1.25m (±0.2m)
- Connectors: 0.78 mm 2-pin
- Cable termination: 4.4mm Balanced
- Weight: 14g per side
- Real Leather Case
- Tips 2 types in 3 sizes (6 pairs)
Current price and availability
- Amazon: Sivga Nightingale Pro
- AliExpress: Sivga Nightingale Pro
7HZ TIMELESS II SPECIFICATIONS
- Driver: 14.5mm planar magnetic driver
- Impedance: 15.2 ohms
- Sensitivity: 108 dB/V@1KHz
- THD: <0.2%/1KHz
- Frequency Response: 5-40000Hz
- Weight per earbud: 5 g
- Connector type: 0.78 mm 2-pin
- Cable: ca. 1.2 m 7N 4-core single-crystal
- Termination: interchangeable 3.5 mm and 4.4 mm jacks.
- Included: metal storage case, cable with interchangeable 3.5mm/4.4mm jack, silicone ear tips
Current price and availability:
- Linsoul: 7hz Timeless II
- Amazon: 7hz Timeless II
LISTENING COMPARISONS
Associated equipment:
- Amplifier: Topping A90
- DAC: RME ADI-2 DAC FS
- Tips: SpinFit CP145
Like Suicide by Soundgarden
The biggest difference is that the Timeless II has more and richer bass along with more energetic treble. The Nightingale Pro is more midrange focused. Both sound very good, but I like the bass presence of the Timeless II.
Sunrise by Norah Jones
The Nightingale Pro has a very polite bass presence, with wonderful vocals placed firmly at centre stage.
The Timeless II has fuller bass and sharper highs. The vocals do not feel recessed, just clear.
In The Mountains by Espen Eriksen Trio
The Timeless II has notably more bass and more pronounced highs. Detail retrieval, soundstage size, and imaging capabilities are similar between the two.
Sujet Tabou by Renaudin and
They are less different here. Both are snappy and fast, though the Timeless II remains the more V-shaped of the two, with more bass and treble presence.
Limit to Your Love by James Blake
The vocals sound rather similar but aren’t identical. Both IEMs are good but Blake’s voice feels even more beautiful with the Nightingale Pro. The Timeless II has notably more bass quantity and also better bass quality.
Eye of The Day by Marta del Grandi
The Nightingale Pro delivers fantastic vocals. The Timeless II also has sweet vocals, but the bass is far more dominant.
Den Gamla Eken by Tingvall Trio
Again, the two are very different. The Timeless II is bassier and brighter, while the Nightingale Pro is midrange focused. Both are snappy, but the Nightingale Pro is more dynamic in the mids.
Sonate in A Minor – II. Allegro – Elisabeth Jacquet de la Guerre by Sophie de la Bardonnèche
The Nightingale Pro sounds terrific with strings, and so does the Timeless II. Both perform excellently and are very similar here. The Nightingale Pro may be a touch more upfront, and the Timeless II slightly darker, but the difference is not large.
Summer 3 Vivaldi Recomposed by Max Richter
This sounds more exciting with the Timeless II, which brings out the lows and highs in a way that makes this track more fun and engaging, even though the Nightingale Pro has a wonderful midrange.
WRAPPING IT UP
Sound Signature
The sound signature is quite different between the Nightingale Pro and the Timeless II.
The Nightingale Pro has a neutral, relatively midrange focused sound signature with a polite bass presence.
The Timeless II has significantly more bass presence and more prominent highs. I prefer not to throw labels like “V-shaped” around too freely, as it tends to kill nuance, but the Timeless II is certainly V-shaped in comparison to the Nightingale Pro.
Treble
Both have clean and clear treble, but the Timeless II feels brighter, still without being overly sharp or piercing.
Put another way, the treble of the Nightingale Pro is “simply there”, while the Timeless II has a more noticeable treble presence. However, your brain adjusts to both easily.
Midrange
The midrange is more upfront and dominant with the Nightingale Pro, which has an exquisite midrange timbre and is very dynamic and snappy. The Timeless II is certainly not bad, but not quite as excellent here. It is a touch darker in tonality and relatively recessed when compared directly.
Bass
The Timeless II has significantly more bass quantity, and I also tend to find it has better bass quality on challenging tracks. That said, the Nightingale Pro mostly delivers excellent bass quality as well.
Soundstage and Imaging
Soundstage size and imaging capabilities are great on both and very comparable. Depending on the track, one may feel better than the other. The extra snappy midrange of the Nightingale Pro can make a positive difference, but so can the extra bass and treble of the Timeless II.
Detail, Dynamics, and Timbre
Generally the detail level is very similar. The midrange is snappier and more tactile with the Nightingale Pro, while the extra bass and treble of the Timeless II can make it feel more dynamic on certain tracks. Both are technically very capable for their price point and equally strong performers, albeit with some differences.
Timbre is one of the differences. As mentioned, the Timeless II has a richer bass, and I think most will find it more natural sounding, while the Nightingale Pro can feel a touch too tight, though that is often referred to as “neutral”.
The midrange is absolutely stunning with the Nightingale Pro, a bit more upfront than the Timeless II, which has a darker tint. The treble is very nice on both. The Nightingale Pro may be more neutral, while the Timeless II is brighter with more sparkle, though not necessarily more natural sounding.
CONCLUSION
Both the Sivga Nightingale Pro and the 7Hz Timeless II are excellent planar magnetic IEMs. In terms of technical performance they are very similar and equally impressive. However, they differ considerably in sound signature and tonal balance.
While the Timeless II still sounds natural, it has notably more bass and a brighter treble. The Nightingale Pro has a more “neutral” delivery. It places greater attention on the midrange, and that midrange is delivered exquisitely.
Both come highly recommended.
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- Amazon: Sivga Nightingale Pro
- AliExpress: Sivga Nightingale Pro
- Linsoul: 7hz Timeless II
- Amazon: 7hz Timeless II
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